Test with UDP sends 10 echo request
packets to the specified host (on port 7/udp). It then shows the round-trip time for
each response, or an error if the echo isn't received. The results window also
displays number of packets sent so far, packets received and lost (not returned), and
minimum, average, and maximum round-trip times for the test. Note: round-trip times
aren't highly accurate - they're affected by machine activity. The results window
also has an Again button to repeat the test, and a Continuous checkbox, which will
repeat the test constantly until the box is unchecked or the window is closed. This
is useful for testing problems over time. If Control is down when the UDP test is
started, the Continuous checkbox will be turned on automatically. A UDP echo daemon
is one of Interarchy's Safe Daemons.

Test
with ICMP looks the same as Test via UDP, but uses lower level ICMP echo packets
instead of UDP echoes. ICMP echoes are generally handled by OS-level networking
software (Open Transport or MacTCP in Mac OS), and thus work even when Interarchy's
Safe Daemons setting is off.